Explanation

The pectoral and pelvic fins are the paired fins in fishes. 

Paired fins:

Fish have two sets of paired fins: pectoral and pelvic. 

Pectoral fins:

These are located on the sides of the fish, and they are used for steering and maneuvering. 

Pelvic fins:

These are located on the ventral (belly) side of the fish, and they help with balance and stability. 

Unpaired fins:

The dorsal, anal and caudal fins are unpaired and situated along the midline of the body.